The Impact of Simulated Corn Earworm (Lepidoptera: Noctuidae) Damage in Indeterminate Soybean

2015 ◽  
Vol 108 (3) ◽  
pp. 1072-1078 ◽  
Author(s):  
B. P. Adams ◽  
A. L. Catchot ◽  
D. R. Cook ◽  
J. Gore ◽  
F. R. Musser ◽  
...  
Keyword(s):  
Corn Earworm ◽  
The Impact ◽  
Lepidoptera Noctuidae

scholarly journals Pest Status and Management of Corn Earworm (Lepidoptera: Noctuidae) in Field Corn in the United States

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Francis P F Reay-Jones
Keyword(s):  
United States ◽  
Selection Pressure ◽  
The United States ◽  
Corn Earworm ◽  
Bt Corn ◽  
Pest Status ◽  
Field Corn ◽  
Type Of Injury ◽  
The Impact ◽  
Economic Pest

Abstract The corn earworm, Helicoverpa zea (Boddie), is a common lepidopteran pest of corn (Zea mays L.) in the United States. This article provides an overview of the life history, ecology, plant injury, and management of H. zea in corn. Leaf injury by H. zea feeding can occur in vegetative stage corn, though this type of injury is rare. The most common type of injury is caused by larval feeding in ears. Because kernel injury is typically limited to the tip of the ear, H. zea is generally not considered an economic pest. The use of transgenic corn hybrids expressing insecticidal Cry proteins from Bacillus thuringiensis (Bt) Berliner can reduce injury from H. zea, though complete control is not achieved with most Bt traits. Resistance has been reported to several Bt toxins. Because H. zea is a major economic pest in cotton (Gossypium hirsutum L.) and because H. zea moths that developed on corn can migrate to cotton, selection pressure on H. zea in Bt corn has major implications for the pest status and injury to Bt cotton. Although the impact of H. zea on yield of field corn is generally negligible, the selection pressure exerted by Bt corn has led to management issues in cotton.

scholarly journals Impact of integrated pest management on the population of leafminers, fruit borers, and natural enemies in tomato

2005 ◽  
Vol 35 (1) ◽  
pp. 204-208 ◽  
Author(s):  
Moacyr Mascarenhas Motta Miranda ◽  
Marcelo Coutinho Picanço ◽  
José Cola Zanuncio ◽  
Leandro Bacci ◽  
Ézio Marques da Silva
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Natural Enemies ◽  
Spodoptera Eridania ◽  
Efficient System ◽  
Action Threshold ◽  
Fruit Borer ◽  
And Control ◽  
The Impact ◽  
Lepidoptera Noctuidae

The objective of this work was to evaluate the impact of integrated pest management (IPM) in the productivity of the tomato and in the populations of leafminers, fruit borers, and natural enemies in tomato crops. The treatments were calendar (spraying twice weekly with insecticides and fungicides), IPM (spraying when action thresholds were achieved), and control (no pesticide was applied). IPM was the most efficient system of pest control due to presenting similar productivity and 65.6% less pesticide applications than in the calendar. The attack of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) and Liriomyza spp. (Diptera: Agromyzidae) to the leaves only achieved the action threshold in the final phase of the cultivation. The main fruit borer was Neoleucinoides elegantalis (Guen.) (Lepidoptera: Crambidae), followed by T. absoluta and Spodoptera eridania (Cr.) (Lepidoptera: Noctuidae). The natural enemy populations were severely reduced by excessive pesticide applications. Predators were more abundant than parasitoids. The most abundant predators were Araneidae, Anthicus sp. (Coleoptera: Anthicidae), Cycloneda sanguinea larva (L.) (Coleoptera: Coccinellidae), Staphylinidae adults (Coleoptera), Orius sp. and Xylocoris sp. (Hemiptera: Anthocoridae), Formicidae (Hymenoptera), and Phlaeothripidae (Thysanoptera). The most abundant parasitoids were Hymenoptera of the families Eulophidae, Braconidae (Bracon sp. and Chelonus sp.), Trichogrammatidae [Trichogramma pretiosum (Riley)] and Bethylidae (Goniozus nigrifemur Ashmead), besides Tachinidae (Diptera).

Population Dynamics of Corn Earworm Larvae (Lepidoptera: Noctuidae) on Corn in the Lower Rio Grande Valley

1990 ◽  
Vol 19 (2) ◽  
pp. 274-280 ◽  
Author(s):  
J. R. Raulston ◽  
K. R. Summy ◽  
J. Loera ◽  
S. D. Pair ◽  
A. N. Sparks
Keyword(s):  
Population Dynamics ◽  
Rio Grande Valley ◽  
Rio Grande ◽  
Corn Earworm ◽  
Lower Rio Grande Valley ◽  
Lepidoptera Noctuidae ◽  
Lower Rio Grande
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